Usually it s because of a bad thread sealant crack in the pump an air leak in the suction line a plumbing issues on the suction side of the pump or a leaky valve stem.
Pool pump not working.
You can also switch to running the pump at night when it s cooler or alternatively providing more shade.
If your pump is not starting you ll want to check a couple of things.
The pool pump motor is not working or turning off while running.
Check to see if something is inhibiting the fan in the bottom vents like leaves or mulch.
Pump is not pumping water if the pump is not pumping water at all check that all suction and return valves are open and the pump lid is on tight with the lid o ring in place.
Pool pump motor not working.
This is what keeps them primed and sucking water properly.
The local pool company sold her a new capacitor as that is the most common cause of a pump not starting however i can t imagine a capacitor making a giant bang when it stops working so either they simply don t listen to their customers or they sell them things they don t need.
Pool pumps leak in two ways.
When the pressure drops the pump cannot work efficiently resulting in a pool that gets dirty faster that it can be cleaned.
Other causes of air leaking into the pump is from leaky valves in front of the pump low water level in the pool or a skimmer weir stuck in the up position.
Pool pumps are supposed to be completely airtight.
The capacitor is what starts the pump by giving it a jolt of electricity.
If your pool pump starts but then shuts off on its own moments later it s often due to overheating.
First check to see if the pump is getting power and check your timer to make sure the pump is on.
How to troubleshoot pool pump vacuum problems.
Air leaks disrupt the vacuum force of the pump and result in inadequate.
If the pump is on and you are hearing a humming noise it could be a bad capacitor.
So when they start sucking air that s a problem.